Method and apparatus for active temperature compensation in...

Details Method and apparatus for active temperature compensation in... Method and apparatus for active temperature compensation in...

H - Electricity

03

B

H03B 5/02 (2006.01) G08B 29/18 (2006.01) H03L 1/02 (2006.01)

Patent

CA 2173173

A method and apparatus for producing a temperature stabilized frequency from a signal generator in a monitoring station is described. The signal generator monitors the voltage response of an RC circuit where the resistive portion is formed by a thermistor, to produce a time-dependent signal. A comparator compares the time-dependent signal to a reference voltage to determine a rise time of the voltage across the capacitor. Based upon a software timer loop, the signal generator determines a temperature range by selecting data from a look-up table based upon the rise time of the RC circuit.

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